1 files changed, 5 insertions, 5 deletions
diff --git a/src/mscorlib/src/System/Collections/CollectionBase.cs b/src/mscorlib/src/System/Collections/CollectionBase.cs
index 1bb08af27a..ae0c0d302d 100644
--- a/src/mscorlib/src/System/Collections/CollectionBase.cs
+++ b/src/mscorlib/src/System/Collections/CollectionBase.cs
@@ -62,7 +62,7 @@ namespace System.Collections {
 
         public void RemoveAt(int index) {
             if (index < 0 || index >= Count)
-                throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index"));
+                throw new ArgumentOutOfRangeException(nameof(index), Environment.GetResourceString("ArgumentOutOfRange_Index"));
             Contract.EndContractBlock();
             Object temp = InnerList[index];
             OnValidate(temp);
@@ -101,13 +101,13 @@ namespace System.Collections {
         Object IList.this[int index] {
             get { 
                 if (index < 0 || index >= Count)
-                    throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index"));
+                    throw new ArgumentOutOfRangeException(nameof(index), Environment.GetResourceString("ArgumentOutOfRange_Index"));
                 Contract.EndContractBlock();
                 return InnerList[index]; 
             }
             set { 
                 if (index < 0 || index >= Count)
-                    throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index"));
+                    throw new ArgumentOutOfRangeException(nameof(index), Environment.GetResourceString("ArgumentOutOfRange_Index"));
                 Contract.EndContractBlock();
                 OnValidate(value);
                 Object temp = InnerList[index];
@@ -163,7 +163,7 @@ namespace System.Collections {
 
         void IList.Insert(int index, Object value) {
             if (index < 0 || index > Count)
-                throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index"));
+                throw new ArgumentOutOfRangeException(nameof(index), Environment.GetResourceString("ArgumentOutOfRange_Index"));
             Contract.EndContractBlock();
             OnValidate(value);
             OnInsert(index, value);
@@ -194,7 +194,7 @@ namespace System.Collections {
         }
 
         protected virtual void OnValidate(Object value) { 
-            if (value == null) throw new ArgumentNullException("value");
+            if (value == null) throw new ArgumentNullException(nameof(value));
             Contract.EndContractBlock();
         }